PDF malware analysis — malicious · b00909520affe6b5

MALICIOUS

PDF

78.2 KB Created: 2021-06-14 04:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 553a95daad1cfe59b6fe18438c83a2af SHA-1: c6c491be906f0769b176080cc373c61f13827868 SHA-256: b00909520affe6b50b2c98fffc11c5030a7270e6f225bd93c05647fc644dba0f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://huntic.ru/pbw?utm_term=download+pokemon+nuzlocke+gba PDF link annotation
- https://megelegekirir.weebly.com/uploads/1/3/4/4/134464092/1385046.pdfIn PDF document text
- https://vipagavufedolaz.weebly.com/uploads/1/3/5/3/135350232/abb1062fa356.pdfIn PDF document text
- https://zokefipevi.weebly.com/uploads/1/3/4/3/134311683/patidu.pdfIn PDF document text
- https://nibedubuw.weebly.com/uploads/1/3/7/5/137517062/7543594.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368243/normal_605a0ed47fc80.pdfIn PDF document text
- https://menosakisidibus.weebly.com/uploads/1/3/5/3/135391165/seluva-pariwivitamigus.pdfIn PDF document text
- https://mulibini.weebly.com/uploads/1/3/4/8/134881685/7655954.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422890/normal_5fcd244553b25.pdfIn PDF document text
- https://kadikodol.weebly.com/uploads/1/3/4/7/134747526/bajisi_kekewuwate_majen_buvidepefasubej.pdfIn PDF document text
- https://zelasiboromur.weebly.com/uploads/1/3/1/6/131606405/8620691.pdfIn PDF document text
- https://vuvararuwojagis.weebly.com/uploads/1/3/4/6/134608035/892d7038e.pdfIn PDF document text
- https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/3690682.pdfIn PDF document text
- https://labisafedowep.weebly.com/uploads/1/3/4/7/134722654/tabilotejopis.pdfIn PDF document text
- https://nuzopotox.weebly.com/uploads/1/3/4/4/134497293/lomopejamukum.pdfIn PDF document text
- https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/jukewa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481286/normal_602fc11cb29ee.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424933/normal_5fd15f6a5b9f0.pdfIn PDF document text
- https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/dareg.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403266/normal_605fa89d51a25.pdfIn PDF document text
- https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/vunitifowam_koxukivabafu_sogumirag.pdfIn PDF document text
- https://woxumonukoke.weebly.com/uploads/1/3/6/0/136090180/fozuni_tusito_jejoxosatabujo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://jivevisubido.pbworks.com/w/file/fetch/144711219/75752265323.pdfIn PDF document text
- http://pazimonofe.pbworks.com/w/file/fetch/144463182/figiv.pdfIn PDF document text
- http://lopasexosew.pbworks.com/w/file/fetch/144665289/legacy_of_discord_cheats_apk.pdfIn PDF document text
- http://dowiginade.pbworks.com/f/groove_ip_apk_download.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000df95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF95	5464 bytes
SHA-256: `b3953f552b8b7e863c6fef4d62a353da93cd1d80a37e793c79bafd741c11c2fa`
`font_01_sfnt_off0000f245.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF245	10452 bytes
SHA-256: `0e5255416ae0e00622f914e0fd48243de66f2877b45e9438341fe5586a597832`
`font_02_sfnt_off000115f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115F7	16160 bytes
SHA-256: `71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0`

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